<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./vue-2.5.js"></script>
</head>
<body>
    <div id="app">
        <my-component :width='100'></my-component>
    </div>
    <script>
        Vue.component('my-component',{
            props:['width'],
            template:`<div :style='style'>组件内容</div>`,
            computed:{
                style:function () {
                    return {
                        width:this.width + 'px'
                    }
                }
            }
        })

        let app = new Vue({
            el:'#app',
        })
    </script>
</body>
</html>